利用CT扫描技术进行冻土研究的现状和展望  

Studying Frozen Soil with CT Technology: Present Studies and Prospects

作　　者：陈世杰[1] 赵淑萍[1] 马巍[1] 杜玉霞[1] 邢莉莉[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000

出　　处：《冰川冻土》2013年第1期193-200,共8页Journal of Glaciology and Geocryology

基　　金：中国科学院寒区旱区环境与工程研究所青年基金项目(51Y251B91);冻土工程国家重点实验室自主课题(Y252J81001);国家自然科学基金项目(41023003;40971046)资助

摘　　要：介绍了CT扫描技术的特点,回顾了利用CT扫描试验进行冻土研究的历史和现状,包括研制与CT配套使用的用于冻土的辅助设备、利用CT数进行冻土内部结构变化分析、利用CT数定义损伤并进行损伤演化研究、利用CT图像进行细观结构分析等,总结了冻土研究领域的代表性成果.最后,指出在现有的技术条件下利用CT扫描技术进行冻土研究所遇到的问题、以及可能的解决办法.其中,着重介绍了高质量CT图像的获取、CT数的变化与冻土试样感兴趣区域内的各组分变化的联系、冻土CT图像的数字化处理方向.结果表明:CT扫描技术是现阶段对冻土内部细观结构进行无损检测的最理想有效的技术之一,借助辅助设备及图像数字化处理,势必对冻土领域的研究发展起到更大作用.In this paper,the characteristics of CT technology are introduced,and the history and current situation of using CT technology on frozen soil study are reviewed,including auxiliary equipment specially designed for frozen soil testing,using CT number to analyze frozen soil internal structure change,using CT number to define and explore damage evolution,and using CT images to observe soil mesostructure.In addition,representative achievements in frozen soil study in relation to CT technology are also summarized in this paper.Finally,problems,possible solutions and challenges in frozen soil study by using CT are pointed out.It is emphatically introduced how to obtain higher quality CT images and how to process digital CT images of frozen soil.The relations between CT number and each component of frozen soil specimens are also discussed.It is found that CT technology is one of the most ideal and effective technologies for studying frozen soil mesostructure as a non-destructive manner.CT technology will play more significant role in the study of frozen soil by means of auxiliary equipment and digital images processing.

关 键 词：CT扫描技术 冻土研究 细观结构变化 损伤 CT图像处理 

分 类 号：TH878[机械工程—仪器科学与技术]